What was found
AIRCRAFT WAS GROUNDED: PILOT REPORTS RETURNED TO PHL ON ACCOUNT OF FLAP PROBLEM (FLAPS AND SLATS JAMMED AFTER TAKEOFF). EMERGENCY DECLARED. LANDED WITHOUT INCIDENT. MAINTENANCE ACCOMPLISHED TSM TASK 27-51-00-810-818-A. ACCOMPLISHED VISUAL INSPECTION OF FLAP TRANSMISSION/DRIVE SYSTEM IAW AMM 27-54-00-601. NO PROBLEMS FOUND. REPLACED 38CV PROX SENSOR IAW AMM 27-51-44-401. IAW WDM 27-51-12, MAINTENANCE FOUND WIRE 2751-5910B TO 40CV PROX SENSOR WITH CHAFF/SHORT TO GROUND AT PLUG 7542VC BACKSHELL. RETIRMINATED PLUG IAW ESPM 20-44-11. FLAP SYSTEM OPS TEST GOOD IAW AMM 27-54-00-501.